Reverse froth flotation of magnesite ore by using (12-4-12) cationic gemini surfactant

Brezani, I.; Škvarla, Jiřı́; Sisol, Martin

doi:10.1016/j.mineng.2017.04.013

Cited by 49 publications

(12 citation statements)

References 13 publications

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“…During the process of flotation, the collector is physically adsorbed on the surface of minerals by an electrostatic attraction. Adsorption of the collector on individual minerals can be controlled by the adjustment of pH of the system [50]. The experiments were thus conducted in slurry at pH of 7, 8.5, and 10, to understand the effect of pH on the recovery of elements.…”

Section: Chemical Reagentsmentioning

confidence: 99%

Assessment of the Possible Reuse of Extractive Waste Coming from Abandoned Mine Sites: Case Study in Gorno, Italy

Mehta

Dino

Passarella³

et al. 2020

Sustainability

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Supply of resources, a growing population, and environmental pollution are some of the main challenges facing the contemporary world. The rapid development of mining activities has produced huge amounts of waste. This waste, found in abandoned mine sites, provides the potential opportunity of extracting raw material. The current study, therefore, focuses on testing the validation of a shared methodology to recover extractive waste from abandoned mines, and applies this methodology to a case study in Gorno, northwest Italy. The methods focused on: (1) analyzing the impact of tailings and fine fraction of waste rock (<2 mm) on plants (Cress -Lepidium Sativum) to assess usability of both as soil additive, and (2) recovering raw materials from tailings and coarse fraction (>2 mm) of waste rock, by means of dressing methods like wet shaking table and froth flotation. The results indicated that the fine fraction of waste rock and tailings did not have detrimental effects on seed germination; however, there was marked decrease in plant growth. As for the recovery of raw materials, the coarse waste rock samples, crushed to <0.5 mm, produced a recovery of Cd, Ga, and Zn-as much as 66%, 56%, and 64%, respectively-using the wet shaking table. The same samples when crushed to 0.063-0.16 mm and used for froth flotation produced a recovery of Cd, Ga, and Zn of up to 61%, 72%, and 47%, respectively. The flotation experiment on tailings showed a recovery of Cd, Ga and Zn at pH 7 of 33%, 6% and 29% respectively. The present investigation highlights the methodologies used for extracting raw materials from extractive waste.

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Section: Chemical Reagentsmentioning

confidence: 99%

Assessment of the Possible Reuse of Extractive Waste Coming from Abandoned Mine Sites: Case Study in Gorno, Italy

Mehta

Dino

Passarella³

et al. 2020

Sustainability

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“…Brandao et al studied the anionic flotation of magnesite (Brandão and Poling, 1982). Ivan et al studied the reverse froth flotation of magnesite ore by using (12-4-12) cationic gemini surfactant (Brezáni et al, 2017). Nermin Gence researched the wettingbehavior of magnesite and dolomite surfaces (Gence, 2006).…”

Section: Introductionmentioning

confidence: 99%

Research on the mechanism of a mixed collector onto magnesite surface to improve the flotation separation of magnesite from hornblende

Wang¹,

Li²,

Dai³

et al. 2021

Physicochem. Probl. Miner. Process.

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Low-grade magnesite is not effectively used mainly due to high silicon content, especially the separation of magnesite and hornblende. In this research, a novel mixture of sodium oleate and dodecyl phosphate collector was used to increase the flotation difference between magnesite and hornblende. Artificially mixed mineral concentrates grade 47.10% (MgO content) concentrate recovery of 84.45% was obtained by micro flotation test, the results showed that the mixed collector of sodium oleate and dodecyl phosphate played a better selective promotion role in the flotation of magnesite. The interaction mechanism of this mixed collector with hornblende and magnesite surfaces was investigated using Fourier transform infrared spectroscopy (FTIR), zeta potential, and X-ray photoelectron spectroscopy (XPS), which showed that the mixed collector in terms of magnesium selection was mainly adsorbed on these magnesium sites of magnesite, and the surface of magnesite thus became hydrophobic, allowing magnesite to float and separate from hornblende.

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“…[5][6][7] Flotation is the most extensively used beneficiation method for phosphate ores. [8][9][10] The flotation process of phosphate ore includes positive, reverse, positive and reverse, and double reverse flotation.…”

Section: Introductionmentioning

confidence: 99%

Flotation separation of dolomite from fluorapatite using NaF as an activator

Guang-hua

Wang

et al. 2021

Surface & Interface Analysis

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For the reverse flotation of phosphate ore, a high amount of sulfuric acid is required. In this study, we used NaF as a flotation activator to separate dolomite and fluorapatite to reduce acid consumption in the flotation process. Both single and actual mineral flotations were conducted. The NaF addition significantly improved the floatability of dolomite and reduced the flotation system's acid consumption. We employed X‐ray photoelectron spectroscopy and Material Studio simulation to examine the effect of dolomite activator (NaF) on the surface of dolomite and fluoroapatite. The addition of NaF showed much less effect on fluoroapatite than dolomite, thereby increasing the difference in floatability between dolomite and fluoroapatite, which is beneficial to flotation.

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Reverse froth flotation of magnesite ore by using (12-4-12) cationic gemini surfactant

Cited by 49 publications

References 13 publications

Assessment of the Possible Reuse of Extractive Waste Coming from Abandoned Mine Sites: Case Study in Gorno, Italy

Assessment of the Possible Reuse of Extractive Waste Coming from Abandoned Mine Sites: Case Study in Gorno, Italy

Research on the mechanism of a mixed collector onto magnesite surface to improve the flotation separation of magnesite from hornblende

Flotation separation of dolomite from fluorapatite using NaF as an activator

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